CN107090113A - A kind of slim foam of novel radiation crosslinked polyethylene and preparation method thereof - Google Patents
A kind of slim foam of novel radiation crosslinked polyethylene and preparation method thereof Download PDFInfo
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- CN107090113A CN107090113A CN201710308134.3A CN201710308134A CN107090113A CN 107090113 A CN107090113 A CN 107090113A CN 201710308134 A CN201710308134 A CN 201710308134A CN 107090113 A CN107090113 A CN 107090113A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
- C08L2312/06—Crosslinking by radiation
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Abstract
The invention discloses a kind of slim foam of novel radiation crosslinked polyethylene and preparation method thereof, it is related to plastic foam material technical field.A kind of slim foam of novel radiation crosslinked polyethylene that the present invention is designed, in terms of mass fraction, includes 42 ~ 87.9% major ingredient and the auxiliary material of surplus；The major ingredient uses LDPE；The foaming agent that the auxiliary material includes the reinforcing aids of POE compositions, the weather-proof additive of EPDM compositions and azodicarbonamide are constituted, the mass fraction that the reinforcing aids, weather-proof additive and foaming agent account for the slim foam of radiant crosslinked polyethylene is respectively 5 ~ 30%, 1 ~ 10% and 5 ~ 10%.Changing material has ideal intrinsic mechanical strength, and ageing-resistant performance and weatherability are also greatly improved.
Description
Technical field
The present invention relates to plastic foam material technical field, in particular to a kind of slim foam of novel radiation crosslinked polyethylene
And preparation method thereof.
Background technology
In recent years, with the fast development of photovoltaic industry, traditional photovoltaic component encapsulating silica gel material is by itself performance
The influence of limitation, technically runs into the bottleneck of conversion efficiency, and needs to carry out solidification crosslinking during sealing, with cleaning fiber crops
The shortcomings of being tired of, be lost larger.In order to break through this technical bottleneck, people have invented photovoltaic component frame package adhesive tape to substitute biography
The silica gel sealing mode of system, forms new component package product, sealant belt have without solidification, it is safe and clean, using letter
Just the characteristics of, being lost few, it is increasingly extensive in the application of photovoltaic industry.
With radiation crosslinking polyethylene foam plastics（IXPE）There is light weight, valency for the ground photovoltaic package adhesive tape that matrix is made
Advantage honest and clean, easy to use, this product has to be never degenerated for 25 years, and nondiscolouring is not ftractureed, anti-ultraviolet property is strong, anti-
The features such as acid-base property is strong, sealing performance is good, and for lamination glass do not result in it is any scratch, can directly fill aluminium
Alloy frame, it is simple to operate, work well.
Occupation rate of market reaches 80% to traditional silica gel mode at home at present, and using polyethylene foam as the photovoltaic of base material
Occupation rate of market is 20% to module frame package adhesive tape at home, and its excellent performance makes it increasingly wide in the application of photovoltaic industry
General, some developed countries have taken the lead in using photovoltaic component frame package adhesive tape of the radiant crosslinked polyethylene for base material as sealing material
Material.
Traditional low density polyethylene (LDPE) is that major ingredient produces radiation crosslinking polyethylene foam plastics, such as Application No.
200710075475.7 Chinese invention patent disclose a kind of IXPE electron radiations crosslinking polyethylene conductive foam cotton and Ei systems
Preparation Method, its rigidity, toughness can not reach photovoltaic industry performance requirement, especially for resistance to strong winds, resistance to heavy rain, the overload of ice piton
Under the conditions of lotus, common IXPE materials easily fail, it is hot and humid under the conditions of, the property degradations of common IXPE materials is serious, sternly
The intensity and persistence of photovoltaic module are have impact on again.
The content of the invention
Present invention aim to provide a kind of slim foam of novel radiation crosslinked polyethylene and preparation method thereof, it has
There is ideal intrinsic mechanical strength, and ageing-resistant performance and weatherability are also greatly improved.
A kind of slim foam of novel radiation crosslinked polyethylene that the present invention is designed, in terms of mass fraction, including 42 ~ 87.9%
Major ingredient and surplus auxiliary material；
The major ingredient uses LDPE；
The auxiliary material includes weather-proof additive and the azodicarbonamide composition that the reinforcing aids of POE compositions, EPDM are constituted
Foaming agent, the reinforcing aids, weather-proof additive and foaming agent account for the mass fraction point of the slim foam of radiant crosslinked polyethylene
Wei 5 ~ 30%, 1 ~ 10% and 5 ~ 10%.
LDPE is low density polyethylene (LDPE), also known as polyethylene from high pressure process, is a kind of plastic material, and it is adapted to thermoplastic molding and added
The various moulding process of work, molding processibility is good, and its density is between 0.890~0.940 gram/cc；
POE is polyolefin elastomer, is that DOW chemical companies of the U.S. divide by catalyst of metallocene with narrow molecular weight
Cloth and the thermoplastic elastomer (TPE) of uniform short-chain branch distribution, with excellent properties such as ageing-resistant, resistance to ozone, resistant to chemical media, lead to
Cross and POE is crosslinked, the heat resisting temperature of material is enhanced, the Main Mechanical such as tensile strength, tearing strength has very big
The raising of degree；
EPDM is also known as ethylene propylene diene rubber, is the copolymer of ethene, propylene and a small amount of non-conjugated diene hydrocarbon, while it is second to be also
One kind of third rubber, its main chain is made up of chemically stable saturated hydrocarbons, only contains unsaturated double-bond in side chain, therefore its is resistance to smelly
The ageing-resistant performance such as oxygen, heat-resisting, weather-proof is excellent.
In order to improve the radiation sensitivity of material, the Third monomer in EPDM is studied, Third monomer may be selected
For drop ice alkane alkene, polyethylene content 70%, the EPDM materials of low rotary viscosity not only increase the toughness of material, and
Due to the presence of Third monomer, irradiation metering is significantly reduced, material is more sensitive effective to radiating, and ageing-resistant performance etc. has
Improved.
Azodicarbonamide constitute foaming agent be also known as AC foaming agents, with performance it is stable, nonflammable, do not pollute, it is nontoxic
It is tasteless, mould is not corroded product is not dyed, decomposition temperature can adjust, and not influence solidification and the features such as shaping speed, and often
Foam, pressure expansion, uniform in foaming, pore structure are preferable.
As the preferred of above-mentioned technical proposal, the major ingredient uses LDPE, and its melt index is 0.3 ~ 1.0, and its material is strong
Degree is bigger, it more difficult to scattered, while the high intensity requirement in order to reach material.
As the preferred of above-mentioned technical proposal, the reinforcing aids and weather-proof additive account for the slim bubble of radiant crosslinked polyethylene
The mass fraction of cotton is respectively 25%, 3%.
As the preferred of above-mentioned technical proposal, the auxiliary material also includes the melt enhancing for accounting for that total amount mass ratio is 0.2 ~ 5%
Agent.
As the preferred of above-mentioned technical proposal, the melt reinforcing agent is ZnO, and it is 0.2 ~ 3% to account for total amount mass ratio.ZnO exists
It is added to herein as blowing promotor in preparation technology.
As the preferred of above-mentioned technical proposal, described is ZnSt, and it is 0.5 ~ 5% to account for total amount mass ratio.ZnSt here as
Heat stabilizer, blowing promotor are added in preparation technology.
Applicant is found surprisingly that, when using POE, EPDM respectively as reinforcing aids and weather-proof additive, zinc oxide
（ZnO）Addition when being less than 0.2%, blowing temperature almost undiminished effect, during more than 3%, blowing temperature is too low, processing
It is interval too narrow, it is unfavorable for being formed the foam structure of exquisiteness；
Same zinc stearate（ZnSt）Addition when being less than 0.5%, blowing temperature almost undiminished effect, while not
Heat stabilizer effect can be played, during more than 5%, ZnSt is also surfactant, when excessive, is unfavorable for plasticizing processing, disperses very
Difference, influences product apparent mass.
As the preferred of above-mentioned technical proposal, the auxiliary material also include account for total amount mass ratio for 0.2 ~ 3% it is anti-oxidant
Agent, the antioxidant be 1010 and DSTP in one or both mixture.
Antioxidant 1010 chemistry is entitled：Four [β-（3,5- di-tert-butyl-hydroxy phenyls）Propionic acid] pentaerythritol ester is white
Color crystalline powder, chemical property is stable, can be widely applied to general-purpose plastics, engineering plastics, synthetic rubber, fiber, PUR, tree
In fat, oil product, ink, the industry such as coating.
DSTP chemical name is thio-2 acid two (18) ester, is excellent thioesters class auxiliary antioxidant, its antioxygen
Change efficiency is high compared with DLTP, and volatility is low, and hot-working loss is small, pollution-free, not colored.
It has been found that when using POE, EPDM respectively as reinforcing aids and weather-proof additive, antioxidant（1010 or
DSTP）Addition when being less than 0.2%, polymer segment declines that solution is serious in the impact of high-velocity electrons, and surface is very viscous, it is impossible to shape
Into foam, during more than 3%, it is unfavorable for the shearing plasticizing of screw rod, causes irradiation dose excessive, formed and wasted；
A kind of preparation method of the slim foam of novel radiation crosslinked polyethylene, comprises the following steps：
1. granulate：Major ingredient, reinforcing aids and weather-proof additive are granulated using dual-screw pelletizer first, mixing is made female
Grain；
The advantage of dual-screw pelletizer-scattered is made full use of herein, and plasticizing effect is good, to prepare masterbatch mix；
Then masterbatch mix and foaming agent are granulated, producing foamed master batch after banburying using single screw rod comminutor；
Banburying is that closed practices glue, and intermittence polymeric material is plasticated under the air-tight state of adjustable temperature and pressure
And mixing.
2. extrude：1. step is prepared completion master batch be put into extruder carry out be extruded into master slice, in the extruder
Last extrusion roller at set die heater；
Theoretically, corresponding relation is d1=d0 (n is coefficient of foaming) between master slice thickness d 0 and product thickness d1, and width is closed
System is also similar.But because master slice has internal stress in actual production, master slice is wide, thickness will carry out appropriate amendment d1=d0+
D is corrected；After master slice is heated in the horizontal foaming furnace of combustion type in foaming process, master slice is wide under interior stress, thickness
Increase, contraction in length influences product specification size after foaming；So the presence of internal stress changes to product size in foaming process
Rule influence is very big；The presence of other internal stress, can cause the product in foaming process crimp, adhesion, disappear so must try one's best
Except the internal stress in master slice, to eliminate in internal stress, extrusion in the roller of extruder three（Last extrusion roller）Place is installed by mould
Warm machine, makes at three rollers coolant water temperature constant in a temperature, and after such master slice discharges at extruding machine mold die orifice, biography guides to three rollers
Will not acute cold generation internal stress in cooling procedure；Simultaneously before three-roll press-polishing, cooled down using tank, allow its internal stress more
It is few, be conducive to follow-up irradiation, the stabilization of foam process；
3. irradiate：The master slice of step 2. middle extrusion is irradiated；
Crosslinking with radiation is the technological means for utilizing the cross-linking reaction between various radiation-initiated polymerization thing high polymer long chains.Here
" radiation " refers to various nuclear radiation such as electron beam, gamma-rays, neutron beam, particle beams etc., if the light radiation such as application of ultraviolet light etc.
Belong to photochemistry field, ultraviolet light-initiated cross-linking reaction, referred to as photo-crosslinking can also be used.We are produced high using electron accelerator
Fast electronics, high-velocity electrons penetrate PE sheet materials and become IXPE sheet materials, are that its molecular chain structure is poly- from being linearly changed into network structure, raising
The intensity of ethene PE sheet materials, could by foaming furnace foaming, because thin gauge sheet is in irradiation process, Tensile stress compared with
Greatly, installed during piece is sent and actively send piece equipment, reduce the tensile stress that sheet material is drawn, while in wrapup procedure, preventing volume
Side, folding of crumpling is more than 100mm reel using diameter；
4. foam：Master slice after 3. step is irradiated carries out the pre-heat treatment, and the foaming section subsequently into foaming furnace is carried out at foaming
Reason；
Improved for the concentricity required precision that press polish is rolled and be less than 0.03mm；
5. corona：Corona discharge is carried out to the foam material surface after foaming, corona discharge power is in 1.5-2KVA；
Corona technology utilization high-frequency high voltage produces low temperature plasma in processed foam surface corona, makes
Frosting produces radical reaction and polymer is crosslinked surfaces roughening and increase its wetting to polar solvent
Property-these gas ions by shocking by electricity and penetrating into by its molecular structure of the surface breakdown of print body, and then by processed surface point
Son oxidation and polarization, ion electric shock erosion surface, so that the adhesive ability on increase stock surface, by a dyne size table for value
Show.In corona discharge power in the range of 1.5-2KVA, slim foam will not be breakdown, thermoelectricity swoon it is double under the conditions of, its dyne
Value can reach more than 51, disclosure satisfy that photovoltaic encapsulation material requirements；
6. rewind：In 4 hours after corona step process, foam material is carried out to rewind processing.
After sided corona treatment, material surface is easily bonded together, particularly it is prolonged carry after, reuse point
When cutting, foam is bonded to web-like, can only be using will be peeled off by the way of slowly drawing between each layer, its inefficiency, seriously
Influence use and the competitiveness of client；Processing is rewinded in progress, foam bonding phenomenon can be effectively prevented, so as to facilitate client to use.
As the preferred of above-mentioned technical proposal, 1. step is：First by major ingredient, reinforcing aids and weather-proof additive using double
Screw pelletizer is granulated, and masterbatch mix is made；Then masterbatch mix and foaming agent are granulated after banburying using single screw rod
Machine is granulated, producing foamed master batch；
Foaming master batch is granulated by single screw extrusion machine again with antioxidant after blending, Hangzhoupro oxygen master batch is made, with melt
Reinforcing agent is granulated by single screw extrusion machine again after banburying, and sensitization master batch is made.
As the preferred of above-mentioned technical proposal, the mode of buying and selling combined after the foaming of step 4. using multiple roll is wound,
It can prevent slim foam from crumpling, wind uneven, raising product thickness uniformity.
A kind of new calendered sheet extrudes cooling device, including one carries out rolling the calendering roller group of extrusion, one to master slice
The circulating cooling pipeline of individual temperature controlled water tank and the connection calendering roller group and the temperature controlled water tank；
The calendering roller group at least includes two stacks being disposed adjacent；
Include the heating member for being heated to water body in the temperature controlled water tank；
Water pump is provided with the circulating cooling pipeline.
As the preferred of above-mentioned technical proposal, the calendering roller group includes three stacks, and two of which is disposed adjacent, the 3rd
It is separately set in the side of the first two.
As the preferred of above-mentioned technical proposal, the water body in the circulating cooling pipeline flows from the inside of the stack
It is logical.
As the preferred of above-mentioned technical proposal, the heating member is heater strip.
As the preferred of above-mentioned technical proposal, circulation water inlet and circulating water outlet are provided with the temperature controlled water tank.
As the preferred of above-mentioned technical proposal, tap water inlets and running water outlet are additionally provided with the temperature controlled water tank.
As the preferred of above-mentioned technical proposal, magnetic valve is provided with the tap water inlets and running water outlet.
As the preferred of above-mentioned technical proposal, the circulating cooling pipeline includes calendering roller group water inlet pipe and calendering roller group
Outlet pipe.
Two stacks that polyethylene foam sheet material enters in calendering roller group, carry out calendering formation.Pass through the mistake of stack
Cooled down simultaneously in journey.Water operation principle in temperature controlled water tank is：Water enters from tap water inlets first, full of temperature control water
Case, heater strip is begun to warm up, when reaching design temperature, opens pumping for water pump, and the current of constant temperature are flowed into calendering roller group from water tank,
To control the temperature of stack, cooling water is entered back into temperature controlled water tank, if water body actual temperature is higher than design temperature, then electricity
Magnet valve open, running water automatically into, if water tank actual temperature be less than design temperature, then magnetic valve is closed automatically, heating
Part is started working, and is so ensured that constant in certain scope into the water temperature in calendering roller group, it is to avoid extrusion sheet
When cause extrusion sheet quality unstable because temperature is unstable, underproof phenomenon.And after change device, after change
Device applicability is stronger, the calendering cooling of applicable multiple material sheet material.
Sheet material extrusion cooling device coolant water temperature is controllable, it is ensured that the chilling temperature of each stack is consistent, stabilizes hair
Steep the surface property of sheet material；Under the larger environment of the room temperature gap such as summer in winter, it is that cooling performance is constant to remain to by regulation and control, enhancing
The homogeneity of sheet quality；And the foam sheet of different materials is applicable to, it is applied widely.
The present invention compared with prior art, with advantages below and beneficial effect：
（1）The slim foam high mechanical strength of novel radiation crosslinked polyethylene of the present invention, relative to prior art, with very
Good tensile strength and elongation at break, while density can't increase；
（2）The slim foam weatherability of novel radiation crosslinked polyethylene of the present invention, ageing-resistant performance compared with prior art more
Plus it is superior；
（3）The slim foam thickness error of novel radiation crosslinked polyethylene of the present invention is small, within 0.05mm；
（4）The slim foam high yield rate of novel radiation crosslinked polyethylene of the present invention, can reach 90% also on.
Brief description of the drawings
Fig. 1 is that new calendered sheet extrudes cooling device structural representation.
In figure：Roll roller group 1, stack 11, temperature controlled water tank 2, heating member 21, circulation water inlet 22, circulating water outlet 23,
Tap water inlets 24, running water outlet 25, circulating cooling pipeline 3, water pump 31, calendering roller group water inlet pipe 32, calendering roller group water outlet
Pipe 33.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings：
The slim foam formula of radiant crosslinked polyethylene described in embodiment 1 ~ 7 is shown in Table 1；
Emittance is 1.0Mev, 50KGY, under the conditions of two layers of irradiation, embodiment 1 ~ 7 and the mechanics parameter pair of common IXPE foams
Than and temperature is 85 degrees Celsius, and humidity is under conditions of 85%, and after processing 1000 hours, embodiment 1 ~ 7 and common IXPE steep
The mechanical property conservation rate contrast of cotton is shown in Table 2；
The formula of foam described in the embodiment 1 ~ 7 of table 1
| Embodiment is numbered | Major ingredient content | Major ingredient melt index | Reinforcing aids content | Weather-proof additive level | Foaming agents content | Melt reinforcing agent and its content | Antioxidant and its content |
| Embodiment 1 | 42% | 0.3 | 30% | 10% | 10% | 5%ZnSt | 3%1010 |
| Embodiment 2 | 64% | 0.3 | 25% | 3% | 5% | 3%ZnO | Nothing |
| Embodiment 3 | 87.9% | 2 | 5% | 1% | 5.9% | 0.2%ZnO | Nothing |
| Embodiment 4 | 61.5% | 2 | 25% | 3% | 10% | 0.5%ZnSt | Nothing |
| Embodiment 5 | 57% | 6 | 25% | 3% | 10% | 5%ZnSt | Nothing |
| Embodiment 6 | 76.8% | 8 | 25% | 3% | 5% | Nothing | 0,2%1010 |
| Embodiment 7 | 74% | 10 | 25% | 3% | 5% | Nothing | 3%DSTP |
Foam described in the embodiment 1 ~ 7 of table 2 and common IXPE foams performance comparison
| Embodiment is numbered | Tensile strength（It is vertical） | Elongation at break（It is vertical） | Density | Mechanical property conservation rate |
| Common foam | 0.72Mpa | 163% | 84.3Kg/m3 | 73% |
| Embodiment 1 | 1.16Mpa | 283% | 84.1Kg/m3 | 96.5% |
| Embodiment 2 | 1.15Mpa | 285% | 83.7Kg/m3 | 93.7% |
| Embodiment 3 | 1.03Mpa | 267% | 84 Kg/m3 | 92.3% |
| Embodiment 4 | 1.13Mpa | 278% | 83.5Kg/m3 | 90.2% |
| Embodiment 5 | 1.14Mpa | 279% | 83.6Kg/m3 | 91.2% |
| Embodiment 6 | 1.13Mpa | 282% | 83.7Kg/m3 | 95.2% |
| Embodiment 7 | 1.12Mpa | 280% | 83.9Kg/m3 | 96.3% |
Mechanical property conservation rate is the average of tensile strength and elongation at break compared to ratio shared by before processing.
Embodiment 8：The preparation method of the slim foam of novel radiation crosslinked polyethylene, comprises the following steps in embodiment 1：
1. granulate：Major ingredient, reinforcing aids and weather-proof additive are granulated using dual-screw pelletizer first, mixing is made female
Grain；Then masterbatch mix and foaming agent are granulated, producing foamed master batch after banburying using single screw rod comminutor；
Foaming master batch is granulated by single screw extrusion machine again with antioxidant after blending, and antioxygen master batch is made, and mixing is female
Grain is granulated by single screw extrusion machine again with blowing promotor after banburying, and sensitization master batch is made.
2. extrude：1. step is prepared completion master batch be put into extruder carry out be extruded into master slice, in the extruder
Last extrusion roller at set die heater；
3. irradiate：The master slice of step 2. middle extrusion is irradiated；
4. foam：Master slice after 3. step is irradiated carries out the pre-heat treatment, and the foaming section subsequently into foaming furnace is carried out at foaming
Reason, the mode of buying and selling combined after foaming using multiple roll is wound；
5. corona：Corona discharge is carried out to the foam material surface after foaming, corona discharge power is in 1.5KVA；
6. rewind：In 4 hours after corona step process, foam material is carried out to rewind processing.
Embodiment 9：The preparation method of the slim foam of novel radiation crosslinked polyethylene, comprises the following steps in embodiment 2 ~ 5：
1. granulate：Major ingredient, reinforcing aids and weather-proof additive are granulated using dual-screw pelletizer first, mixing is made female
Grain；Then masterbatch mix and foaming agent are granulated, producing foamed master batch after banburying using single screw rod comminutor；
Masterbatch mix is granulated by single screw extrusion machine again with blowing promotor after banburying, and sensitization master batch is made.
2. extrude：1. step is prepared completion master batch be put into extruder carry out be extruded into master slice, in the extruder
Last extrusion roller at set die heater；
3. irradiate：The master slice of step 2. middle extrusion is irradiated；
4. foam：Master slice after 3. step is irradiated carries out the pre-heat treatment, and the foaming section subsequently into foaming furnace is carried out at foaming
Reason, the mode of buying and selling combined after foaming using multiple roll is wound；
5. corona：Corona discharge is carried out to the foam material surface after foaming, corona discharge power is in 2KVA；
6. rewind：In 4 hours after corona step process, foam material is carried out to rewind processing.
Embodiment 10：The preparation method of the slim foam of novel radiation crosslinked polyethylene in embodiment 6 and embodiment 7, including
Following steps：
1. granulate：Major ingredient, reinforcing aids and weather-proof additive are granulated using dual-screw pelletizer first, mixing is made female
Grain；Then masterbatch mix and foaming agent are granulated, producing foamed master batch after banburying using single screw rod comminutor；
Foaming master batch is granulated by single screw extrusion machine again with antioxidant after blending, and antioxygen master batch is made.
2. extrude：1. step is prepared completion master batch be put into extruder carry out be extruded into master slice, in the extruder
Last extrusion roller at set die heater, while before press polish, being cooled down using tank；
3. irradiate：The master slice of step 2. middle extrusion is irradiated；
4. foam：Master slice after 3. step is irradiated carries out the pre-heat treatment, and the foaming section subsequently into foaming furnace is carried out at foaming
Reason, the mode of buying and selling combined after foaming using multiple roll is wound；
5. corona：Corona discharge is carried out to the foam material surface after foaming, corona discharge power is in 1.8KVA；
6. rewind：In 4 hours after corona step process, foam material is carried out to rewind processing.
Embodiment 11：With reference to Fig. 1, a kind of new calendered sheet extrudes cooling device, including one is rolled to master slice
The circulation of the calendering roller group 1 of extrusion, a temperature controlled water tank 2 and the connection inside of calendering roller group 1 and the temperature controlled water tank 2 is cold
But circulation has recirculated water in pipeline 3, the circulating cooling pipeline 3；
The calendering roller group 1 includes three stacks 11, and two of which is disposed adjacent, and the 3rd is separately set in the one of the first two
Side；
Include the heating member 21 for the heater strip that water body is heated to be made in the temperature controlled water tank 2, circulate the He of water inlet 22
Circulating water outlet 23, is additionally provided with tap water inlets 24 and running water outlet 25, the tap water inlets 24 and running water outlet
Magnetic valve is provided with 25；
Water pump 31 is provided with the circulating cooling pipeline 3, also includes calendering roller group water inlet pipe 32 and calendering roller group outlet pipe
33。
Claims (10)
1. a kind of slim foam of novel radiation crosslinked polyethylene, it is characterised in that in terms of mass fraction, include 42 ~ 87.9% master
The auxiliary material of material and surplus；
The major ingredient uses LDPE；
The auxiliary material includes weather-proof additive and the azodicarbonamide composition that the reinforcing aids of POE compositions, EPDM are constituted
Foaming agent, the reinforcing aids, weather-proof additive and foaming agent account for the mass fraction point of the slim foam of radiant crosslinked polyethylene
Wei 5 ~ 30%, 1 ~ 10% and 5 ~ 10%.
2. a kind of slim foam of novel radiation crosslinked polyethylene according to claim 1, it is characterised in that：The major ingredient is adopted
With LDPE, its melt index is 0.3 ~ 1.0.
3. a kind of slim foam of novel radiation crosslinked polyethylene according to claim 1 or 2, it is characterised in that：It is described to increase
The mass fraction that strong auxiliary agent and weather-proof additive account for the slim foam of radiant crosslinked polyethylene is respectively 25%, 3%.
4. a kind of slim foam of novel radiation crosslinked polyethylene according to claim 1, it is characterised in that：The auxiliary material is also
Include the melt reinforcing agent for accounting for that total amount mass ratio is 0.2 ~ 5%.
5. a kind of slim foam of novel radiation crosslinked polyethylene according to claim 4, it is characterised in that：The melt increases
Strong agent is ZnO, and it is 0.2 ~ 3% to account for total amount mass ratio.
6. a kind of slim foam of novel radiation crosslinked polyethylene according to claim 4, it is characterised in that：The melt increases
Strong agent is ZnSt, and it is 0.5 ~ 5% to account for total amount mass ratio.
7. a kind of slim foam of novel radiation crosslinked polyethylene according to claim 1, it is characterised in that：The auxiliary material is also
Include the antioxidant for accounting for that total amount mass ratio is 0.2 ~ 3%, the antioxidant is one kind in 1010 and DSTP.
8. a kind of preparation method of the slim foam of novel radiation crosslinked polyethylene, it is characterised in that comprise the following steps：
1. granulate：Major ingredient, reinforcing aids and weather-proof additive are granulated using dual-screw pelletizer first, mixing is made female
Grain；Then masterbatch mix and foaming agent are granulated, producing foamed master batch after banburying using single screw rod comminutor；
2. extrude：1. step is prepared completion master batch be put into extruder carry out be extruded into master slice, in the extruder most
Die heater is set at latter extrusion roller；
3. irradiate：The master slice of step 2. middle extrusion is irradiated；
4. foam：Master slice after 3. step is irradiated carries out the pre-heat treatment, and the foaming section subsequently into foaming furnace is carried out at foaming
Reason；
5. corona：Corona discharge is carried out to the foam material surface after foaming, corona discharge power is in 1.5-2KVA；
6. rewind：In 4 hours after corona step process, foam material is carried out to rewind processing.
9. a kind of preparation method of slim foam of novel radiation crosslinked polyethylene according to claim 8, it is characterised in that：
1. step be：Major ingredient, reinforcing aids and weather-proof additive are granulated using dual-screw pelletizer first, mixing is made female
Grain；Then masterbatch mix and foaming agent are granulated, producing foamed master batch after banburying using single screw rod comminutor；
Foaming master batch is granulated by single screw extrusion machine again with antioxidant after blending, Hangzhoupro oxygen master batch is made, with melt
Reinforcing agent is granulated by single screw extrusion machine again after banburying, and sensitization master batch is made.
10. a kind of preparation method of slim foam of novel radiation crosslinked polyethylene according to claim 8, its feature exists
In：The mode of buying and selling combined after the foaming of step 4. using multiple roll is wound.
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| CN201710308134.3A CN107090113A (en) | 2017-05-04 | 2017-05-04 | A kind of slim foam of novel radiation crosslinked polyethylene and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710308134.3A CN107090113A (en) | 2017-05-04 | 2017-05-04 | A kind of slim foam of novel radiation crosslinked polyethylene and preparation method thereof |
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| CN107090113A true CN107090113A (en) | 2017-08-25 |
Family
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| CN108034383A (en) * | 2017-12-28 | 2018-05-15 | 张家港康得新光电材料有限公司 | Shading foam tape, its preparation method and electronic equipment |
| CN108084909A (en) * | 2017-12-28 | 2018-05-29 | 张家港康得新光电材料有限公司 | The preparation method of shading foam tape |
| CN109762229A (en) * | 2018-12-24 | 2019-05-17 | 浙江万里新材料科技有限公司 | A kind of Radiation Crosslinked Polyethylene foam material and preparation method thereof |
| CN109824955A (en) * | 2018-12-24 | 2019-05-31 | 浙江万里新材料科技有限公司 | A kind of Radiation Crosslinked Polyethylene foam material and preparation method thereof |
| CN110343317A (en) * | 2019-07-12 | 2019-10-18 | 余修军 | A kind of IXPE foam and preparation method |
| CN110527169A (en) * | 2019-08-30 | 2019-12-03 | 浙江润阳新材料科技股份有限公司 | A kind of preparation and its equipment of flame-retardant smoke inhibition foamed material |
| CN113234269A (en) * | 2021-05-07 | 2021-08-10 | 湖北祥源新材科技股份有限公司 | Foam material applied to nose bridge patch of medical mask, preparation method and application |
| CN114933753A (en) * | 2022-05-16 | 2022-08-23 | 浙江创富新材料有限公司 | Preparation method of electron cross-linked radiation polyethylene conductive foam |
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| CN113234269A (en) * | 2021-05-07 | 2021-08-10 | 湖北祥源新材科技股份有限公司 | Foam material applied to nose bridge patch of medical mask, preparation method and application |
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